Carnauba is the hardest natural occurring wax available.巴西棕榈是一种天然的最硬物质.He skirted the hardest issues, concentrating on areas of possible agreement...他避开了最棘手的问题，将精力集中于有可能达成一致的领域。Bridge design is probably the hardest brain...
我们 ( 与他们 ) 订有维修合约, 现在不能撤消.Having contracted ( with them ) to do the repairs, we cannot withdraw now.我们用保兑的, 不可撤消的信用证为付款条件.We insisted on payment by a confirmed, irrevocable letter of credit.1906年民事上诉法院撤消了1894年的判决.In 1906...